Helberg (crater)
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| Crater characteristics | |
| Coordinates | 22.5° N, 102.2° W |
|---|---|
| Diameter | 62 km |
| Depth | Unknown |
| Colongitude | 103° at sunrise |
| Eponym | Robert J. Helberg |
Helberg is a lunar crater that is located just behind the western limb of the Moon, on the far side from the Earth. Due to libration this part of the surface is sometimes brought into view, and the crater is visible under suitable lighting conditions. However even under these circumstances the crater is viewed from the edge and not much detail can be seen.
This crater is nearly attached to the east-northeastern rim of the Robertson crater. Within a crater diameter to the northwest lies Berkner crater, and further to the east is Bell crater.
This is an eroded crater formation which overlays 'Helberg C' along the east-northeastern side and 'Helberg H' to the southeast. The southern rim is somewhat uneven, with an area of intrusion to the southwest. The interior floor has the remains of a crater rim at the northern end. It is otherwise relatively featureless.
[edit] Satellite craters
By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Helberg crater.
| Helberg | Latitude | Longitude | Diameter |
|---|---|---|---|
| C | 23.4° N | 100.6° W | 70 km |
| H | 21.8° N | 101.2° W | 29 km |
[edit] References
- Andersson, L. E.; Whitaker, E. A., (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
- Blue, Jennifer (July 25, 2007). Gazetteer of Planetary Nomenclature. USGS. Retrieved on 2007-08-05.
- Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 0-521-81528-2.
- Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 0-936389-27-3.
- McDowell, Jonathan (July 15, 2007). Lunar Nomenclature. Jonathan's Space Report. Retrieved on 2007-10-24.
- Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by The Working Group of Commission 17 of the IAU". Space Science Reviews 12: 136.
- Moore, Patrick (2001). On the Moon. Sterling Publishing Co.. ISBN 0-304-35469-4.
- Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 0521335000.
- Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 0-913135-17-8.
- Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes, 6th revision, Dover. ISBN 0-486-20917-2.
- Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 0-521-62248-4.
- Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 1852331933.
